[issue7058] Add some test execution environment protection to regrtest

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

Committed to trunk in r75255, py3k in r75279, and 3.1 in r75280. 
Leaving open until 2.6 is unfrozen and I can commit it there as well.

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assignee:  -> r.david.murray
resolution:  -> accepted
stage: patch review -> committed/rejected

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7058>
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